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Surface Energy and Crystallization Phenomena of Ammonium Dinitramide
Author(s) -
Teipel Ulrich,
Heintz Thomas
Publication year - 2005
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.200500032
Subject(s) - wetting , recrystallization (geology) , surface tension , crystallization , surface energy , nucleation , materials science , chemical engineering , thermodynamics , composite material , chemistry , organic chemistry , paleontology , physics , engineering , biology
Abstract Ammonium dinitramide (ADN) was characterized during recrystallization from the melt. The surface tension of molten ADN at 97 °C was measured to be 89 mN/m. The wetting angles between molten ADN and different solid surfaces (polytetrafluoroethylene, glass, steel, and aluminum) were determined. The wettability depends on the surface tension of molten ADN, the free surface energy of the solid surfaces and the interfacial tension between the solid and liquid. Observations of the recrystallization behavior of molten ADN showed that nucleation does not occur, even at super cooling rates of 70 K. Crystallization can be initiated by the application of seed crystals.